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Portable Fire Extinguishers <br /> Squeeze the lever. To release the extinguishing agent, squeeze the two levers together with one <br /> hand while you aim the hose at the base of the fire with the other. Apply slow and even pressure <br /> when you squeeze the levers. To stop discharging the extinguisher, release the levers. <br /> I <br /> , .I <br /> .I <br />